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《Journal of Northwest A & F University(Natural Science Edition)》 2011-01
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Population characteristic of Xanthoceras sorbifolia in hill area of Loess Plateau

GUO You-yan1,2,ZHANG Wen-hui1,HE Jing-feng1,ZHOU Jian-yun1(1 Northwest A&F University of Agriculture and Forestry Key Laboratory of Environment and Ecology of Education Ministryin West China,Yangling,Shaanxi 712100,China;2 Daxinganling Vocational College,Jiagedaqi,Heilongjiang 165000,China)  
【Objective】 The research studied population characteristic of Xanthoceras sorbifolia in different habitat standing in hilly area of Loess Plateau to provide theoretical basis for X.sorbifolia plantation's natural growth.【Method】 Selecting representative natural forest X.sorbifolia in sunny,semi-sunny and semi-shady slope,six plots were set up in each slope.By researching,the detailed study on the age structure and spatial pattern,standard and static life table at different slopes and survival curve for X.sorbifolia population in hilly area of Loess Plateau was worked out.【Result】 The age structure was progressive,the number of young growth individuals was greater than these of half-mature and mature individuals.The life tables present that the mortality rates were highest at age class,decreased with age increasing,and went up again at age class Ⅴ and Ⅵ owing to plant decrepitude.The survival curve belongs to the type of Deevey Ⅲ,and the spatial distribution of population was aggregative pattern generally.The aggregative intensity was decreased and tended to a random distribution along with age increasing,greater in semi-sunny slope optimum for X.sorbifolia.【Conclusion】 The management measures should combine X.sorbifolia with characteristics of physiology and propagation.
【Fund】: 陕西省科技计划项目(2010K01-06-2)
【CateGory Index】: S794.9
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